The speed of the car was 85 kilometres per hour.
这汽车的速度是每小时85公里。
It did not fly very fast: only at 48 kilometres per hour.
迅速飞得不很多：只是在每个小时48公里。
Early trains, like the Rocket, had a top speed of 50 kilometres per hour.
早期的火车，像火箭，最快速度是每小时50公里。
Early trains, like the Rocket, had a top speed of 50 kilometres per hour.
早期的火车，像火箭，最快速度是每小时50公里。
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